Myoepithelial Sweat Gland Tumor: Myoepithelioma

Lever, Walter F.

doi:10.1001/archderm.1948.01520150054008

Cited by 25 publications

(1 citation statement)

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“…Occasional breast tumours show the cylindromatous pattern (Stewart, 1946), as do a number of skin tumours deriving from the sweat glands (Lever, 1948). Histology General histological pattern.-The most commonly observed histological pattern in cylindroma is that shown in Fig.…”

Section: Nomenclaturementioning

confidence: 99%

The Histology of Cylindroma of Mucous Gland Origin

Thackray¹,

Lucas²

1960

Br J Cancer

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IT is now generally agreed that classification of mucous gland tumours on histological grounds is a useful procedure since the various types of tumour bear differing prognoses. Though there is still lack of unanimity with regard to details of nomenclature, most pathologists and clinicians would probably agree to the recognition of the following neoplasms as distinct entities.1. Mixed tumours.-These are the neoplasms traditionally described These four groups of neoplasms constitute the great majority of all tumours of mucous glands and warrant separate recognition on grounds of structure and behaviour. In addition, there are the less common tumours such as those of the oxyphil, acinic cell and papillary cystadenoma type, and the mesenchymal tumours, which are not further considered here.With regard to the behaviour of the commoner neoplasms, the mixed tumours are generally regarded as benign. However, they show a marked propensity for recurrence, due to factors such as the leaving behind of peripheral nodules of growth after enucleation, the implantation of neoplastic cells in the tumour bed and the presence of focal infiltrations (Patey and Thackray, 1958). Apart from recurrences due to such causes there is the question of whether mixed tumours can change in type to become carcinomatous. It is generally believed that such changes do occur in a certain proportion of cases (Foote and Frazell, 1953;Frazell, 1954;Patey and Thackray, 1958) but that on the whole they are infrequent.The muco-epidermoid tumours, on the other hand, behave as malignant growths, both with regard to local invasion and metastatic deposits. The cylindromas show a similar natural history, for they too are locally invasive growths and are also capable of giving rise to metastases. Their rate of growth, however,

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Section: Nomenclaturementioning

confidence: 99%